A Queens man who dumped his cyber-gal pal claims she then trashed his fiancée online as a drug-addicted tramp — by setting up sexually explicit profiles using pictures of her lifted from social-media sites.

Emmanuil Sadikov filed a $5 million lawsuit in Brooklyn federal court Thursday against the enraged woman and three alleged cohorts, saying they smeared his fiancée, Evelina Elterman, by setting up nasty sex- and dating-site profiles using her face and name and forwarding links to the couple’s shocked friends and family.

The soon-to-be-married couple lives in Kew Gardens.

A source said Sadikov once had an online relationship with one of the alleged tormentors, but after he broke it off, she hijacked innocent online pics of Elterman from social media and created the ugly profiles on largely Russian networking pages.

The suit accuses Izabella and Khananiya Avshman, of Allen, Texas, and Florida and Semyon Fishkin, of Dallas, of cooking up the online character assassination.

None of the defendants could immediately be reached for comment.

The fake profiles also directly attacked Sadikov, labeling him a “dishonest person” who “is abusing Evelina Elterman and paying her for sex,” the suit states.

The couple got some of the profiles taken down but the online campaign against them has continued, court papers state.

Izabella Avshman told them directly last month that the attacks won’t stop until their reputations “completely ruined,” the suit says.

Avshman did not return a call for comment.

The crew also sent “direct messages” to their relatives portraying the couple as drug addicts and derelicts, the suit claims. It does not specify what social-networking site was used to send those messages.

The nasty profiles and messages have destroyed Sadikov’s personal life and his real-estate business, the suit claims.

“As a result of the defendant’s actions, plaintiffs friends and family have stopped talking to Emmanuel Sadikov and Evelina Elterman and Emmanuel Sadikov’s business associates have refused to conduct business with him,” the suit says.

Sadikov declined to comment on the case or the exact nature of his relationship with the defendants.